baber/WOPTO huggingface dataset:
Patent GB-675373-A (GB)
Title: Electronic wave generator employing a transistor
IPC: H03K3/26
Filed: 1950-01-04
Abstract: 675,373. Semi-conductor amplifiers. RADIO CORPORATION OF AMERICA. Jan. 4, 1950 [Jan. 4, 1949], No. 227/50. Class 40 (iv). [Also in Group XL (c)] An electronic wave generator comprises a condenser which is charged at a predetermined rate and discharged periodically through a transistor, the condenser being connected between the base and collector electrodes of the transistor. Fig. 2 shows a transistor arrangement comprising a block of semi-conducting material 1 with emitter 2, collector 3 and base electrode 4. A condenser 12 is charged from source 13 through resistance 14, and is connected between the collector electrode and earth. A resistance 16 is connected between the base electrode and earth. The emitter electrode is biased positively from an adjustable voltage source 18. The arrangement is such that condenser 12 charges until the collector voltage reaches a critical level at which the current through the resistance 16 increases and reduces the potential of the base electrode. This effectively increases the emitter bias, which further increases the base electrode current, thus providing a cumulative effect so that condenser 12 is rapidly discharged. Saw-tooth wave-forms are thus produced across condenser 12, and square-topped pulses may be taken from across resistance 16 or across resistance 22 in the emitter circuit. The arrangement may be adjusted to generate a single pulse or saw-tooth waveform in response to a trigger pulse by biasing the emitter negatively. The trigger pulse may then consist of a positive pulse applied to the emitter or a negative pulse applied to the base electrode. The use of the arrangement for frequency dividing or as a synchronized saw-tooth generator is also described.
Patent GB-787750-A (GB)
Title: Improvements relating to releasable anchorages
IPC: B64C1/20
Filed: 1955-01-04
Abstract: 787,750. Releasable fastenings. HARLEY, F. B., and HARLEY PATENTS (INTERNATIONAL), Ltd. Dec. 23, 1955 [Jan. 4, 1955], No. 250/55. Class 44 A releasable anchorage includes a channel 1 of which the sides 4, 5 have inturned flanges 2, 3 containing at least two pairs of gaps 6, one of each pair in each flange, and a removable member 11 having two heads 12, 13 each of which is insertable into the channel by traversing a pair of the gaps and movable along said channel to positions in which the heads are retained in the channel by engagement with the undersurfaces of the flanges at positions spaced from the gaps, means for locking the member in the channel, and a connecting piece directly connecting the heads so as to lie along the bottom of the channel when in position, and a load receiving member 16 attached to the removable member. As shown the channel has a plurality of pairs of gaps of arcuate shape and it is provided with screw holes 8 in its base for securing it to a structure. The heads 12, 13 are spaced by a distance equal to the spacing between consecutive pairs of gaps. The means for locking the removable member to the channel comprises a plug 18 carried by the connecting piece adjacent the head 12 and movable into one of the pairs of gaps to prevent movement of the member 11. When the plug is engaged with a pair of the gaps the heads are spaced midway between adjacent pairs of the gaps. The plug is mounted on a stud and a helical compression spring is trapped between a shoulder at the lower end of the plug and a circular nut 21 screwed to the upper end of the stud. The upper end of the plug has a knurled rib 23 by which it can be pulled against the action of the spring to enable the member 11 to be moved from the channel. The load receiving member 16 is a ring to which a lashing rope can be secured and it is mounted on the member 11 midway between the heads 12 and 13. In a modification the spring is omitted and the plug 18 is screw threaded on to a threaded stud.
Patent GB-218335-A (GB)
Title: Improvements in and relating to high-frequency electric signalling systems
IPC: H03C5/00
Filed: 1923-01-04
Abstract: 218,335. Robinson, E. H., Taggart, J. Scott-, and Radio Communication Co., Ltd. Jan. 4, 1923. Keying systems and apparatus. - An electric discharge tube containing a gas of high conductivity such as neon is employed in the low frequency circuit for modulating the high frequency oscillations. The neon tube V<2> is connected in series with the second ary of the microphone transformer T across part or the whole of the aerial inductance L', which is included in the anode circuit of a thermionic valve transmitter V<1>. A steady potential is applied to the neon tube to cause it to function at a bend on its voltage resistance curve by means of a tapping from the high tension battery B<2>, and a by-pass condenser C<2> may be shunted across the transformer T. Alternatively, the neon tube may be shunted across a circuit coupled to the aerial circuit or may be in parallel with the low frequency circuit, with suitable choke coils and condensers.
Patent GB-574150-A (GB)
Title: Improvements in wearing apparel
IPC: A41D17/00
Filed: 1944-01-07
Abstract: 574,150. Leg coverings. DUNLOP RUBBER CO., Ltd. and GREENFIELD, M. Jan. 7, 1944, No. 305. [Classes 17 (ii) and 141] A garment of the type having limb portions closed at the extremity, such as an overall or protective garment, has co-operating fastening elements on the outside by means of which these portions may be adjusted in length. The invention is shown applied to the leg portion of an overall protective garment. A flap b has depending ends b<1> attached to each of which is a component of a press stud fastening d. Two or more pairs of complementary press stud members e are provided in spaced relationship on the garment itself, one of which is engaged by the member d to effect an introversion. In the inoperative position, the members d engage coincident components on the garment.
Patent GB-822313-A (GB)
Title: Improvements in deep bar rotor induction motors
Inventor: GILBERT CHARLES PRENTER
IPC: H02K17/20
Filed: 1957-01-03
Abstract: 822,313. Squirrel cage windings. SCOTT & ELECTROMOTORS Ltd., L. Jan. 3, 1957, No. 360/57. Class 35. A deep-bar squirrel-cage rotor comprises a plurality of rotor discs 1 with slots 2 punched adjacent the periphery and containing rotor bars, the slots and bars having at least one bend in a plane at right-angles to the rotor axis, the apex 9 of the bend, or of each bend, pointing circumferentially of the rotor discs.
Patent GB-551069-A (GB)
Title: Improvements in or relating to high-frequency amplifying circuits
IPC: H03F3/22
Filed: 1942-01-09
Abstract: 551,069. Valve amplifying circuits. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Jan. 9, 1942, No. 374. [Class 40 (v)] In a push-pull high frequency amplifier variation in the input capacity during gain control is prevented by interconnecting the cathodes and providing ohmic impedance in the anode or a screen circuit the voltage across which is applied to the control grid of the opposite valve of the pair. Fig. 1 shows resistances 13, 14 in the screen-grid circuits coupled to the appropriate control grids by condensers 15, 16. In Fig. 3 the resistances 13, 14 are common to the anode and screen grid circuits but may be in the anode circuit only, Fig. 2 (not shown) in the latter case the ohmic impedance may be constituted by part of the output circuit, Fig. 5 (not shown). The coupling to the control grid may be its capacity to the screen grid, Fig. 4 (not shown) and the ohmic resistance may also in this case be constituted by part of the output oscillatory circuit as shown in Fig. 6 in which the voltages are taken from tappings 17, 18 and applied through the control-grid to screen grid capacity. Phase displacement in the valve at very high frequencies may be compensated by replacing resistances 13, 14 by impedances of appropriate phase-angle.
Patent GB-1407921-A (GB)
Title: Resin compositions
IPC: C09D163/00
Filed: 1974-01-04
Abstract: 1407921 Epoxy resins COAL INDUSTRY (PATENTS) Ltd 1 Feb 1974 [1 Feb 1973 4 Jan 1974] 5026/73 and 00398/74 Heading C3B A resin composition comprises an epoxide resin, a toluene-formaldehyde resin, preferably in an amount of 2-500 p.b.w. per 100 p.b.w. of epoxide resin, formed by the condensation of aromatic hydrocarbons containing at least 70% wt. toluene with formaldehyde or a formaldehyde donor, and an amine curing agent having at least 2 primary or secondary amino groups and a molecular weight of less than 1500. The epoxide resin preferably has 1À8-2À3 oxirane rings per molecule and a molecular weight of less than 500. Suitable epoxides are the diglycidyl ether of 2,2<SP>1</SP>-bis-(4-hydroxyphenyl)- propane or of the bisphenol prepared by reacting phenol and divinyl benzene; bis-(N-glycidyl-4- aminophenyl) methane; reaction products of glycidol and aliphatic or aromatic primary diamines; glycidyl esters; aliphatic diepoxides and epoxidized polybutadiene. Suitable amines include diethylene triamine, triethylene tetramine, N-(2-hydroxyethyl) diethylene triamine, dicyandiamide, 1,3-diaminobenzene, N-aminoethylpiperazine, bis-(4-aminophenyl) methane, diaminoisophorone, bis - (4 - amino - 3 - methylcyclohexyl) methane, bis - (4 - aminophenyl)- sulphone, and the reaction products of diethylene triamine and triethylene tetramine with any one of the following:-Diels-Alder dimers and trimers of mixed linoleic acids, acrylonitrile, di-glycidyl ethers of bisphenols. The amine preferably has a polarity of above 0À2 and less than 1, the polarity being the ratio of the relative atomic proportions of N and O atoms to C atoms. The oxygen content of the toluene-HCHO resin is preferably from 1-15% wt. The compositions can be used as surface coatings, adhesives and floorings and may be of the 2-component type in which the amine and toluene-HCHO resin forms one component and the epoxide resin the second component.
Patent GB-264782-A (GB)
Title: Improvements relating to building construction
IPC: E04B1/24
Filed: 1925-08-14
Abstract: 264,782. Atholl, (J. G. S. Murray), Duke of. Aug. 14, 1925. Wall; wall coverings.-In structures comprising upright metal frame members supporting outer plates from which an inner wall or lining is spaced, the outer metal plates overlap horizontally and their upper edges are bent over inwardly and support a framing to which asbestos or other sheets constituting the inner wall or lining are fixed. The metal plates a<1> arranged between, and secured to, uprights a are set back near their upper ends a<4> so as to present a plane surface when overlapped, and are bent inwardly at a<5> to support nailing strips a<8>. Wooden uprights a<7> connected by cross pieces a<10> are secured to the strips a<8> and provide a framing to which the inner sheets a<6> or lining is secured. Jointing material, such as lead or bitumen, may be applied between the metal sheets, and they may be coated with red lead or bitumen.
Patent GB-620113-A (GB)
Title: Improvements relating to horizontal pull-out drawers, trays and the like
IPC: A47B88/14
Filed: 1947-01-06
Abstract: 620,113. Drawers. JACKSON, L., WALSH, N. A., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Jan. 6, 1947, No. 479. [Class 52 (i)] A drawer or like receptacle 2 has an upwardly projecting catch 5 at the front of its housing cooperating with a catch 6 on the drawer bottom to retain the drawer when closed and on withdrawal the drawer tilts about the part 5 until an abutment 8 on the rear edge of the drawer engages the housing to maintain the drawer in a substantially horizontal position. A rear skid or roller 9 may be provided which also serves as a stop on withdrawal.
Patent GB-747521-A (GB)
Title: Improvements relating to transistor amplifiers
IPC: H03F1/30
Filed: 1954-01-07
Abstract: 747,521. Transistor amplifying circuits. GENERAL ELECTRIC CO. Jan. 7, 1954 [Jan. 7, 1953], No. 491/54. Class 40 (6). In a temperature-stabilized amplifier, a junction diode having characteristics variable with temperature is connected in the circuit in such a manner as to oppose the normal current flow so that variations in the collector current with temperature are reduced. It is shown mathematically that a junction diode 22 of suitable characteristics, Fig. 1, in the base circuit of transistor 11 may be arranged to keep the collector current constant with changing temperature. When a second transistor 12 is added, the first stage 11 is undercompensated to make the collector current through output load 33 substantially independent of temperature, the amount of compensation being adjusted by variable resistor 23. In a modification, Fig. 3, the diode 22 is arranged in a network 35 coupling the transistors 11, 12. In a further modification, Fig. 4 (not shown) the diode is returned to a tap on resistor 31, resistors 39, 40 being omitted. Alternatively, Fig. 5 (not shown), the resistor 39 alone may be omitted.
Patent GB-228512-A (GB)
IPC: D21C11/00
Filed: 1925-01-08
Abstract: Methyl alcohol is evolved when waste sulphite cellulose lye is heated together with absorption carbon or clay, and also possibly a small quantity of an acid, to a temperature of or below 200 DEG  C. According to an example, concentrated sulphite cellulose lye is mixed with absorption carbon and a small quantity of hydrochloric acid and the pasty mass heated preferably to a temperature of 180 DEG  C. at a pressure not exceeding 10 atmospheres.  Methyl alcohol inter alia is distilled off and the residue, which consists of an adsorption carbon, may be used again in the process.  The Specification as open to inspection under Sect. 91 (3) (a) includes the use of any substance having a large surface area in place of absorption carbon or clay, kieselguhr being mentioned as a further example.  This subject-matter does not appear in the Specification as accepted.ALSO:Sulphur dioxide is evolved when waste sulphite cellulose lye is heated together with absorption carbon or clay and also possibly a small quantity of an acid to a temperature of or below 200 DEG  C. According to an example, concentrated sulphite cellulose lye is mixed with adsorption carbon and a small quantity of hydrochloric acid and the pasty mass heated preferably to a temperature of 180 DEG  C. at a pressure not exceeding 10 atmospheres.  Sulphur dioxide is evolved and the residue which consists of an adsorption carbon may be used in the process.  The Specification as open to inspection under Sect. 91 (3) (a) includes the use of any substance having a larger surface area in place of absorption carbon or clay, kieselguhr being mentioned as a further example.  This subject-matter does not appear in the Specification as accepted.
Patent GB-468635-A (GB)
Title: Improvements in portable wireless signalling apparatus
IPC: H01Q1/26
Filed: 1936-01-08
Abstract: 468,635. Wireless signalling. PINTSCH AKT.-GES., J. Jan. 8, 1936, No. 702. Convention date, Jan. 8, 1935. [Class 40 (v)] A portable short-wave transmitter and receiver takes the form shown in the Figure. The valve 2 is mounted inside a reflector 1, which simulates the muzzle of a revolver, the Lecher-wire tuning and supply leads being contained in the bore or casing 3, and a supply battery 7 in the handle 8. A sighting- telescope 10 helps the operator to direct the radiated beam on to a distant receiver. Triggers 9, 91 are used for Morse keying and for changing-over from transmission to reception by altering the potentials applied to the valve electrodes. A microphone 12 is located inside a casing 11. Or modulation may be effected by moving screens 15 set in the aperture of the reflector 1. The triggers 9, 91 may be replaced by push-button contacts, and the battery may be carried in the pocket of the operator. The metal reflector 1 may be replaced by dipole aerials set in the walls of an insulating body of the same shape ; and it may be hinged so that it can be pointed in any desired direction.
Patent GB-553388-A (GB)
Title: Manufacture of sulphuric acid by the contact system
IPC: C01B17/76
Filed: 1942-01-17
Abstract: 553,388. Sulphuric acid. ROBSON, S., and NATIONAL PROCESSES, Ltd. Jan. 17, 1942, No. 719. [Classes 1 (i) and 1 (ii)] Sulphur dioxide obtained by burning pyrites &c. is subjected to dry purification and cooled to 100-120‹ C. before use in the contact process of producing sulphuric acid. Preferably the pyrites and the combustion air are dried. The Figure illustrates a plant in which pyrites from a bin 2 are dried in a drier 3 and burned in a flash roasting plant 1 supplied with air from a drier 8. The gases of combustion are passed through a cyclone 9, waste heat boiler 10, electrostatic precipitator 11 and cooler 12 where arsenious oxide is condensed at about 100‹ C. In chamber 13 any sulphur trioxide present is neutralized by injecting lime dust, and the gases then pass through a bag filter 14 to the converter 16.
Patent GB-914886-A (GB)
Title: Electrical conductors with polyester resin insulations and processes for the production thereof
IPC: C08G63/19
Filed: 1960-01-08
Abstract: A polyester wire varnish resin is the reaction product of (1) terephthalic acid or an ester-forming derivative thereof alone or in admixture with another dicarboxylic acid or an ester-forming derivative thereof (e.g. phthalic, isophthalic, maleic or succinic acid), (2) a dihydric compound comprising a mixture of a dihydric alcohol (e.g. ethylene glycol or propylene glycol) and 5-75 mol. per cent of a bis-phenol and (3) a compound containing more than three hydroxyl groups (e.g. glycerol or pentaerythritol).  The molar ratio between (2) and (3) used is from 1:0,3 to 1:3 and the molar ratio between (1) and (2)+(3) used is such that the reaction mixture contains 1,2 to 3 hydroxyl groups for each carboxyl group (or its equivalent). Specified bis-phenols are 4:41-dihydroxydiphenyl, 2:2- bis-(p-hydroxyphenyl)-propane, 4:41-dihydroxy-diphenylsulphone and 4:41-dihydroxydiphenyl ether.  Polyesterification may be effected in the presence of a catalyst such as an alkali, an alcoholate of an alkali metal, an alkaline earth metal or aluminium, an ester of boric or titanic acid or an organic salt of zinc, antimony, cerium or zirconium, the catalyst used in the examples being zinc resinate or a mixture thereof with antimony oxide.  The polyesters are soluble in diacetone alcohol, methyl glycol acetate, xylene, cresol and phenol. They are made into wire varnishes by dissolving them in a mixture of xylenol or cresol and solvent naphtha or xylene and adding a hardening agent (e.g. an organic metal salt of zinc, cerium, zirconium, manganese, lead or cobalt or an organium titanium, aluminium or silicon compound).  In the examples, butyl titanate is used as hardening agent together with zinc resinate as a flowing agent.  In examples, polyesters were made by (1) Heating together dimethyl terephthalate, bis-phenol A, ethylene glycol and glycerine; (2) Heating together dimethyl terephthalate and bis-phenol A, adding ethylene glycol and glycerine and continuing the heating; (3) Heating together bis-phenol A and maleic anhydride, adding dimethyl terephthalate, 1:2-propylene glycol and glycerine and continuing the heating.  Specification 775,082 is referred to.
Patent GB-1091696-A (GB)
Title: Improvements in or relating to piezoelectric ceramic compositions
Inventor: OUCHI HIROMU
IPC: C04B35/51
Filed: 1966-01-07
Abstract: <PICT:1091696/C1/1> A ceramic solid solution consists of a material having the formula <FORM:1091696/C1/1> where, in mole fractions, x=0.010 to 0.655; y=0.125 to 0.750 and z=0 to 0.750 with x + y + z = 1.
Patent GB-1360171-A (GB)
Title: Moulded bath with supporting framework
IPC: A47K3/17
Filed: 1972-11-17
Abstract: 1360171 Supports for baths TRENT VALLEY ENG CO Ltd 17 Nov 1972 [7 Jan 1972] 850/72 Heading A4N The lip 2 of a moulded plastics bath 1 is supported by a framework comprising an angle iron 3 connected to a plurality of U-shaped tubular steel supports 4 by a plurality of members 5 welded to the underside of the angle iron 3 and a corresponding number of nut and bolt assemblies 6, each member 5 being distorted from an original dished shape, Fig. 1 (not shown) on tightening of the respective assembly to lock the framework in position. An elongated vertical aperture (7), Figs. 2 and 4, (not shown) in each member 5 is reduced in width when the respective assembly is tightened with the members 3 and 4 in relative adjustment. Each support 4 has a circular aperture to accommodate the shank of the respective bolt.
Patent GB-906938-A (GB)
Title: Improvements in and relating to methods of alloying to semiconductor bodies
IPC: C30B31/04
Filed: 1959-01-09
Abstract: 906,938. Semi-conductor devices. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 9, 1959 [Jan. 14, 1958], No. 891/59. Drawings to Specification. Class 37. A semi-conductor body is provided with an electrode of aluminium alloy by first alloying a non-aluminium component of the alloy to the semi-conductor body and then providing and fusing aluminium to the component to provide the electrode. The semi-conductor may consist of germanium and the alloy component of lead. The aluminium may be added as a dispersion in polymethylmetacrylate in xylene, or a powder of aluminium and silver may be used. The final proportion of aluminium in the electrode may be less than 5%. The invention may be used to produce a transistor or a diode.
Patent HK-44385-A (HK)
Title: Overhead electric and optical transmission systems
Inventor: DEY PHILIP
IPC: G02B6/44
Filed: 1985-06-06
Abstract: In an optical guide joint in an overhead electric transmission system of the kind in which overhead electric conductors 1, which include an optical guide 18 comprising at least one optical fibre for the transmission of light, are freely supported in long lengths between spaced towers, each optical guide 18 connected at the joint passes into a housing 21 which is mounted above the ground on a tower, which accommodates the optical fibre joint 30 and which is at least partially filled with an electrically insulating medium in a fluid or semi-fluid state to an extent sufficient to surround the optical fibre joint. Each optical guide 18 effects a fluid-tight seal with a wall of the housing or enters the housing in such a way that risk of water entering the housing is eliminated.
Patent HK-78491-A (HK)
Title: Polymers and radiosensitive compositions containing them
Inventor: SCHNELLER ARNOLD DR DIPL-CHEM
IPC: G03F7/022
Filed: 1991-10-03
Abstract: 1. A polymer which is insoluble in water, but soluble in aqueous alkaline solutions and which contains repeating units of the general formula I   see diagramm : EP0212439,P15,F1   in which R is a hydrogen or halogen atom, a cyanide group or an alkyl group of 1-4 carbon atoms, R**1 , R**2 and R**3 are identical or different and denote hydrogen or halogen atoms, alkyl, alkoxy or alkoxy-carbonyl groups, R**4 is a hydrogen atom or a divalent organic group which is intermolecularly or intramolecularly linked to a further unit of the formula I, on average at least one R**4 of each polymer unit corresponding to formula I being hydrogen, A denotes the atoms required for completing a mononuclear or dinuclear carbocyclic or heterocyclic aromatic ring system and m is 2 or 3.
Patent JP-2000199529-A (JP)
Title: Torque transfer structure
Inventor: KITAMURA MASAAKI
IPC: F16K51/00
Filed: 1999-01-05
Abstract: PROBLEM TO BE SOLVED: To provide torque transfer structure to prevent the occurrence of excessive torque transfer. SOLUTION: A hub 8 forming an output shaft is rotatably loosely fitted in the internal part of the hole part 4 of a cap 3 forming an input shaft. An input shaft ring 13 locked on the inner peripheral surface of the cap 3 and around an axis and an output shaft ring 14 locked on the outer peripheral surface of the hub 8 and around an axis are inserted externally of the hub 8 and alternately laminated. A press hole part 4 to receive the reaction forces of the rings 13 and 14 is formed on the opening side. A slope engaged in a peripheral direction is formed on a contact surface between both the rings 13 and 14. This constitution causes the occurrence of a slip between slopes when excessive torque is applied, bends the rings 13 and 14, and races the whole of the cap 3 against the hub 8.